子数组异或查询

import java.util.*;
import java.util.stream.*;

/**
 * Solution to calculate XOR for given ranges in queries using Java Streams.
 */
public class SolutionStream {
    /**
     * Method to find XOR from Li to Ri for each query using Streams.
     * 
     * @param arr the input array
     * @param queries the query array where each query is [Li, Ri]
     * @return an array containing the results of each query
     */
    public int[] xorQueries(int[] arr, int[][] queries) {
        int n = arr.length;
        int[] prefixXor = new int[n + 1];
        for (int i = 0; i < n; i++) {
            prefixXor[i + 1] = prefixXor[i] ^ arr[i];
        }
        return Arrays.stream(queries)
                     .mapToInt(query -> prefixXor[query[1] + 1] ^ prefixXor[query[0]])
                     .toArray();
    }
}